Tenacity
-
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.85-3.942.33-2.37
1
7.18
👆🏻
Fracture
Conchoidal, Uneven
Uneven
Cleavage
{010} Good, {100} Distinct
Perfect on {001}, imperfect on {110}
Mohs Hardness
5-5.54.5-5
2
10
👆🏻
Chemical Composition
(Mn2+ ,Fe2+ ,Mg,Ca) 2(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na)Ca4Si8O20(F,OH)•8(H2O)